Combined door knob and bell.



970,222. Patented Sept. 13,1910.

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R. HAZELRIGG. COMBINED DOOR KNOB AND BELL. APPLICATION rILnn APR. 21:. 1909.

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[NI/ENTOR ATTORNEY,

UNITED STATES PATENT OFFICE.

ROSS HAZELRIGG, OF OAKLAND, CALIFORNIA, ASSIGNOR F ONE-HALF TO PARDON M. BOWEN, JR, OF ALAMEDA, CALIFORNIA.

COMBINED DOOR KNOB AND BELL.

970,222. Specification of Iletterslatent- Patented Sept. 13, 1910. Application filed April 28, 1909. Serial No. 492,761.

To all whom it may concern: plate 5. Said socket 4: has its outer end Be it known that I, Ross HAZELRIGG, citishouldered as indicated at 6 and terminates zen of the United States, residing at Oakin a reduced extension 7 provided with opland, in the county of Alameda and State positely disposed longitudinal slots 8 and of California, have invented certain'new and also with a transverse pin 9. A base plate useful Improvements in Combined Door 10 has a shouldered portion 11 fitting over Knobs and Bells, of which-the following the shouldered portion 6 of the socket, said is a specification, reference being had therebase plate being annular and provided with in to the accompanying drawing. a tubular extension 12 which fits loosely This invention relates to door knobs, and over the socket 4 and extends into the door has particularly in view a bell attachment plate 5, said extension being provided with therefor which will sound an alarm when a transverse opening 13 which is adapted to the knob is turned. be engaged by a pin 15 slid-ably mounted in In carrying out the object of the invention a guide slot or lug 16 projecting from the generally stated above it is contemplated door plate 5 to lock said extension to the forming one of the knobs of a bell shell and door plate and thereby prevent the rotation inclosing therein novel hammer operating of base plate 10 when the knobs are rotated, mechanism whereby when the knob 'is roas will be obvious. tated, said hammer will strike the bell A sleeve 17 surrounds the extension 7 of rapidly thus indicating to the occupants of the socket 4 and is provided with oppositely the house that said knob is being rotated. disposed longitudinal slots 18 through which In connection with the foregoing it is conthe pin 9 projects and in which said pin has templated equipping the improved knob a limited play so that said sleeve may be with means whereby the striker or hammer slightly rotated without contacting with actuating mechanism may be disengaged and said pin 9, thus compensating for incidental also with means whereby the actuating mechjars or the like such as might tend to sound anism may be permitted to rotate with the the alarm. Said sleeve has its outer end knob, and thereby prevent the alarm to be provided with an outstanding reduced por sounded. tion 19 provided with a threaded opening It will be understood of course that the 20 for the reception of a screw or the like essential features involved in carrying out 21 which holds the bell metal shell 22 fast the invention are necessarily susceptible of but detachable thereon. Said sleeve 17 has changes in details and structural arrangea squared base 23 which rests on a gear segments, but a preferred and practical embodiment 24 the teeth 25 of which are in mesh ment thereof is shown in the accompanying with a pinion 26 fast on the hub 27 of a drawings, Wherein-- gear wheel 28 carried by apin or lug 29 Figure 1 is a sectional View of the improjecting from the base plate 10. Said roved knob and alarm, showing the same gear segment is provided with an enlarged attached to a door. Fig. 2 is a horizontal opening 30 which surrounds the extension 7 sectional View thereof taken on the line 2-2, and whose opposite edges are provided with Fig. 1. Fig. 8 is a similar view taken on the lugs 31 which engage with the slots 8 of line 3-3, Fig. 1 with the sleeve and shoulder said extension 7 the arrangement being such removed. Fig. 4 is a View in side elevation that one of said lugs is at all times in enof the improved knob and alarm. gagement with one of the slots, thus assur- Referring to said drawings by numerals, ing of the said segment having a uniform 1 designates a door through which the knob relative movement to said extension. Said spindle 2 projects in the usual manner and gear segment is also provided with an uphas a knob 3 fast on one end thereof, said standing rounded end 32 which serves as an knob 3 being of the conventional type. The abutment for the squared end or base 23 of other end of said spindle projects into a the sleeve? so that the turning of sleeve 7 socket 4 rotatably seated in a stationary door causes said squared base 28 to act as an cecentric upon said abutment and thereby impart a sliding movement to said segment 24 to disengage the same from the pinion 26 said upstanding rounded end also serves as an abutment for the curved or coiled free end 33 of a spring 34 which has its opposite end soldered or otherwise rigidly fastened to the base plate 10.

An escapement lever 35 is pivotally mounted on the base plate 10 and has its angular ends 36 held in the path of movement of the teeth of the gear wheel 28. Said escapement lever carries a rod extension 37 having a hammer 38 at its outer end.

A cam or eccentric 39 is carried by one end of a shaft 40 which projects through the base plate 10, said cam being located within the end coil or convolution of the spring 34. Said shaft 40 has its outer end provided with a knob or handle 41 whereby itmay be rotated to turn the cam 39 and cause it to contact with the coiled end of the spring 34 and move the same from contact with the abutment end of the gear segment.

It will be seen from the foregoing that with the parts of the invention in the position shown in the accompanying drawings, a rotation of either knob will cause the gear segment to rotate the pinion 26 and gear 28 thus actuating the escapement lever 35 to cause the hammer 38 to rapidly strike the shell 22, and thereby sound an alarm. To prevent the said gear segment operating the alarm, the cam or eccentric 39 may be rotated to remove the pressure of the spring 34 from the end thereof, thus permitting said gear segment to move from engagement with the pinion 26 by the contact of the squared end of sleeve 7 and thereby permit the knob to be turned without the alarm being sounded. Or if desired, the base plate 10 may be lockedto the door plate 5 by means of the pin 15 carried by the door plate 5, so that said base plate will not rotate when the knobs are turned. The first described manner of preventing the alarm being sounded is to permit occupants of the house to open the door without noise, the last mentioned manner being used when it is not necessary or desirable to have the alarm sounded, such for instance as when the door is within the vision of the occupants.

What I claim as my invention is 1. A device of the character described comprising a spindle, a socket fast to one end thereof, a knob in the form of a bell detachably connected to said socket, a base erated by said socket to actuate said bell striking mechanism carried by said plate, a gear segment slidable on said plate and operated by said socket to actuate said bell striking mechanism, a spring normally holding said segment in engagement with the striking mechanism, and means for causing the said gear to slide to a disengaged position.

2. A device of the character described comprising a spindle, a socket thereon provided with a'slotted extension, a sleeve surrounding said extension, a knob in the'form of a bell detachably secured to said sleeve, a base plate loosely mounted on said socket, bell striking mechanism carried by said plate, a gear segment surrounding said extension and provided with lugs engaging with the slots therein, and a spring for normally holding said segment in engagement with said striking mechanismj 3. A device of the character described comprising a spindle, a socket fast thereon and provided with an extension, a sleeve surrounding said extension, a pin for holding said extension in engagement with said sleeve, a bell metal shell carried by said sleeve, a base plate loosely mounted on said socket, bell striking mechanism carried by said base plate, a gear segment surrounding said extension and adapted to slide transversely thereto, a spring for holding said segment in engagement with said striking mechanism, and a cam for removing the pressure of said spring from said segment.

4. A device of the character described comprising a bell metal shell, a spindle a socket supported by said spindle, a base plate carried by said socket, a stud carried by said plate, gear wheels mounted on said stud, a gear segment slidably carried by said socket for actuating said gears, means carried by said spindle socket for sliding said segment away from said gears, a hammer actuated by said gears to strike said shell, a spring for holding said segment in engagement with said gears, and means for removing the pressure of said spring from said segment.

5. A device of the character described comprising a spindle a socket, a base plate loosely mounted thereon, bell striking mechanism carried by said base plate, gears for operating said mechanism, a gear segment carried by said socket, a spring for holding said segment in engagement with said gears, a shaft extending through said plate, a cam carried by one end of said shaft, and a knob for actuating said shaft to cause the cam to remove the pressure of the spring from said segment.

6. A device of the character described comprising a spindle, a socket mounted thereon and provided with a reduced and slotted extension, a pin extending transversely through said extension, a sleeve surrounding said extension and provided with slots which are engaged by said pin, a bell metal shell detachably connected to said sleeve, a base plate loosely mounted on said I the said gear segment away from the gear 10 socket, a gear segment surrounding said of the strlklng mechanism.

extension and provided with inwardly projecting lugs which enga e with the slots therein, bell striking mechanism carried by said plate, gears for operating said striking mechanism, a spring for normally holding said segment in en agement with said gears, and means carried y said sleeve for moving In testimony whereof I hereunto aflix my signature in presence of two Witnesses.

ROSS HAZELRIGG.

Witnesses:

F. P. Sonnonmm, H. C. SCHROEDER. 

